<?php  // $Id: index.php,v 1.201.2.7 2008/09/19 06:22:43 nicolasconnault Exp $
	   // index.php - the front page.

///////////////////////////////////////////////////////////////////////////
//																	   //
// NOTICE OF COPYRIGHT												   //
//																	   //
// Moodle - Modular Object-Oriented Dynamic Learning Environment		 //
//		  http://moodle.org											//
//																	   //
// Copyright (C) 1999 onwards  Martin Dougiamas  http://moodle.com	   //
//																	   //
// This program is free software; you can redistribute it and/or modify  //
// it under the terms of the GNU General Public License as published by  //
// the Free Software Foundation; either version 2 of the License, or	 //
// (at your option) any later version.								   //
//																	   //
// This program is distributed in the hope that it will be useful,	   //
// but WITHOUT ANY WARRANTY; without even the implied warranty of		//
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the		 //
// GNU General Public License for more details:						  //
//																	   //
//		  http://www.gnu.org/copyleft/gpl.html						 //
//																	   //
///////////////////////////////////////////////////////////////////////////


	if (!file_exists('./config.php')) {
		header('Location: install.php');
		die;
	}

	require_once('config.php');
	require_once($CFG->dirroot .'/course/lib.php');
	require_once($CFG->dirroot .'/lib/blocklib.php');

	if (empty($SITE)) {
		redirect($CFG->wwwroot .'/'. $CFG->admin .'/index.php');
	}

	// Bounds for block widths
	// more flexible for theme designers taken from theme config.php
	$lmin = (empty($THEME->block_l_min_width)) ? 100 : $THEME->block_l_min_width;
	$lmax = (empty($THEME->block_l_max_width)) ? 210 : $THEME->block_l_max_width;
	$rmin = (empty($THEME->block_r_min_width)) ? 100 : $THEME->block_r_min_width;
	$rmax = (empty($THEME->block_r_max_width)) ? 210 : $THEME->block_r_max_width;

	define('BLOCK_L_MIN_WIDTH', $lmin);
	define('BLOCK_L_MAX_WIDTH', $lmax);
	define('BLOCK_R_MIN_WIDTH', $rmin);
	define('BLOCK_R_MAX_WIDTH', $rmax);

	// check if major upgrade needed - also present in login/index.php
	if ((int)$CFG->version < 2006101100) { //1.7 or older
		@require_logout();
		redirect("$CFG->wwwroot/$CFG->admin/");
	}
	// Trigger 1.9 accesslib upgrade?
	if ((int)$CFG->version < 2007092000 
		&& isset($USER->id) 
		&& is_siteadmin($USER->id)) { // this test is expensive, but is only triggered during the upgrade
		redirect("$CFG->wwwroot/$CFG->admin/");
	}

	if ($CFG->forcelogin) {
		require_login();
	} else {
		user_accesstime_log();
	}

	if ($CFG->rolesactive) { // if already using roles system
		if (has_capability('moodle/site:config', get_context_instance(CONTEXT_SYSTEM))) {
			if (moodle_needs_upgrading()) {
				redirect($CFG->wwwroot .'/'. $CFG->admin .'/index.php');
			}
		} else if (!empty($CFG->mymoodleredirect)) {	// Redirect logged-in users to My Moodle overview if required
			if (isloggedin() && $USER->username != 'guest') {
				redirect($CFG->wwwroot .'/my/index.php');
			}
		}
	} else { // if upgrading from 1.6 or below
		if (isadmin() && moodle_needs_upgrading()) {
			redirect($CFG->wwwroot .'/'. $CFG->admin .'/index.php');
		}
	}


	if (get_moodle_cookie() == '') {
		set_moodle_cookie('nobody');   // To help search for cookies on login page
	}

	if (!empty($USER->id)) {
		add_to_log(SITEID, 'course', 'view', 'view.php?id='.SITEID, SITEID);
	}

	if (empty($CFG->langmenu)) {
		$langmenu = '';
	} else {
		$currlang = current_language();
		$langs = get_list_of_languages();
		$langlabel = get_accesshide(get_string('language'));
		$langmenu = popup_form($CFG->wwwroot .'/index.php?lang=', $langs, 'chooselang', $currlang, '', '', '', true, 'self', $langlabel);
	}

	$PAGE	   = page_create_object(PAGE_COURSE_VIEW, SITEID);
	$pageblocks = blocks_setup($PAGE);
	$editing	= $PAGE->user_is_editing();
	$preferred_width_left  = bounded_number(BLOCK_L_MIN_WIDTH, blocks_preferred_width($pageblocks[BLOCK_POS_LEFT]),
											BLOCK_L_MAX_WIDTH);
	$preferred_width_right = bounded_number(BLOCK_R_MIN_WIDTH, blocks_preferred_width($pageblocks[BLOCK_POS_RIGHT]),
											BLOCK_R_MAX_WIDTH);
	print_header($SITE->fullname, $SITE->fullname, 'home', '',
				 '<meta name="description" content="'. s(strip_tags($SITE->summary)) .'" />',
				 true, '', user_login_string($SITE).$langmenu);

?>


<table id="layout-table" summary="layout">
  <tr>
  <?php
	$lt = (empty($THEME->layouttable)) ? array('left', 'middle', 'right') : $THEME->layouttable;
	foreach ($lt as $column) {
		switch ($column) {
			case 'left':
	if (blocks_have_content($pageblocks, BLOCK_POS_LEFT) || $editing) {
		echo '<td style="width: '.$preferred_width_left.'px;" id="left-column">';
		print_container_start();
		blocks_print_group($PAGE, $pageblocks, BLOCK_POS_LEFT);
		print_container_end();
		echo '</td>';
	}
			break;
			case 'middle':
	echo '<td id="middle-column">'. skip_main_destination();

	print_container_start();

/// Print Section
	if ($SITE->numsections > 0) {

		if (!$section = get_record('course_sections', 'course', $SITE->id, 'section', 1)) {
			delete_records('course_sections', 'course', $SITE->id, 'section', 1); // Just in case
			$section->course = $SITE->id;
			$section->section = 1;
			$section->summary = '';
			$section->sequence = '';
			$section->visible = 1;
			$section->id = insert_record('course_sections', $section);
		}

		if (!empty($section->sequence) or !empty($section->summary) or $editing) {
			print_box_start('generalbox sitetopic');

			/// If currently moving a file then show the current clipboard
			if (ismoving($SITE->id)) {
				$stractivityclipboard = strip_tags(get_string('activityclipboard', '', addslashes($USER->activitycopyname)));
				echo '<p><font size="2">';
				echo "$stractivityclipboard&nbsp;&nbsp;(<a href=\"course/mod.php?cancelcopy=true&amp;sesskey=$USER->sesskey\">". get_string('cancel') .'</a>)';
				echo '</font></p>';
			}

			$options = NULL;
			$options->noclean = true;
			echo format_text($section->summary, FORMAT_HTML, $options);

			if ($editing) {
				$streditsummary = get_string('editsummary');
				echo "<a title=\"$streditsummary\" ".
					 " href=\"course/editsection.php?id=$section->id\"><img src=\"$CFG->pixpath/t/edit.gif\" ".
					 " class=\"iconsmall\" alt=\"$streditsummary\" /></a><br /><br />";
			}

			get_all_mods($SITE->id, $mods, $modnames, $modnamesplural, $modnamesused);
			print_section($SITE, $section, $mods, $modnamesused, true);

			if ($editing) {
				print_section_add_menus($SITE, $section->section, $modnames);
			}
			print_box_end();
		}
	}

	if (isloggedin() and !isguest() and isset($CFG->frontpageloggedin)) {
		$frontpagelayout = $CFG->frontpageloggedin;
	} else {
		$frontpagelayout = $CFG->frontpage;
	}

	foreach (explode(',',$frontpagelayout) as $v) {
		switch ($v) {	 /// Display the main part of the front page.
			case FRONTPAGENEWS:
				if ($SITE->newsitems) { // Print forums only when needed
					require_once($CFG->dirroot .'/mod/forum/lib.php');

					if (! $newsforum = forum_get_course_forum($SITE->id, 'news')) {
						error('Could not find or create a main news forum for the site');
					}

					if (!empty($USER->id)) {
						$SESSION->fromdiscussion = $CFG->wwwroot;
						if (forum_is_subscribed($USER->id, $newsforum)) {
							$subtext = get_string('unsubscribe', 'forum');
						} else {
							$subtext = get_string('subscribe', 'forum');
						}
						print_heading_block($newsforum->name);
						echo '<div class="subscribelink"><a href="mod/forum/subscribe.php?id='.$newsforum->id.'">'.$subtext.'</a></div>';
					} else {
						print_heading_block($newsforum->name);
					}

					forum_print_latest_discussions($SITE, $newsforum, $SITE->newsitems, 'plain', 'p.modified DESC');
				}
			break;

			case FRONTPAGECOURSELIST:

				if (isloggedin() and !has_capability('moodle/site:config', get_context_instance(CONTEXT_SYSTEM)) and !isguest() and empty($CFG->disablemycourses)) {
					print_heading_block(get_string('mycourses'));
					print_my_moodle();
				} else if ((!has_capability('moodle/site:config', get_context_instance(CONTEXT_SYSTEM)) and !isguest()) or (count_records('course') <= FRONTPAGECOURSELIMIT)) {
					// admin should not see list of courses when there are too many of them
					print_heading_block(get_string('availablecourses'));
					print_courses(0);
				}
			break;

			case FRONTPAGECATEGORYNAMES:

				print_heading_block(get_string('categories'));
				print_box_start('generalbox categorybox');
				print_whole_category_list(NULL, NULL, NULL, -1, false);
				print_box_end();
				print_course_search('', false, 'short');
			break;

			case FRONTPAGECATEGORYCOMBO:

				print_heading_block(get_string('categories'));
				print_box_start('generalbox categorybox');
				print_whole_category_list(NULL, NULL, NULL, -1, true);
				print_box_end();
				print_course_search('', false, 'short');
			break;

			case FRONTPAGETOPICONLY:	// Do nothing!!  :-)
			break;

		}
		echo '<br />';
	}

	print_container_end();

	echo '</td>';
			break;
			case 'right':
	// The right column
	if (blocks_have_content($pageblocks, BLOCK_POS_RIGHT) || $editing || $PAGE->user_allowed_editing()) {
		echo '<td style="width: '.$preferred_width_right.'px;" id="right-column">';
		print_container_start();
		if ($PAGE->user_allowed_editing()) {
			echo '<div style="text-align:center">'.update_course_icon($SITE->id).'</div>';
			echo '<br />';
		}
		blocks_print_group($PAGE, $pageblocks, BLOCK_POS_RIGHT);
		print_container_end();
		echo '</td>';
	}
			break;
		}
	}
?>

  </tr>
</table>

<?php
	print_footer('home');	 // Please do not modify this line
?>
